How to Set First Responder for Nstextview in Swift

How to set first responder for NSTextView in Swift?

Corrected Answer

In AppKit, you need:

if mainTextField.acceptsFirstResponder {
    mainTextField.window?.makeFirstResponder(mainTextField)
}

In this case, it's probably safe to not check acceptsFirstResponder, but it doesn't hurt either.

Original Answer (UIKit)

You need to call mainTextField.becomeFirstResponder().

How to move cursor when new NSTextView becomes FirstResponder (MacOS)?

I was able to get the desired behaviour by doing this:

  func makeNSView(context: NSViewRepresentableContext<TextView>) -> TextView.NSViewType {
        let textView = NSTextView()
        textView.textContainer?.lineFragmentPadding = 10
        textView.textContainerInset = .zero
        textView.font = NSFont.systemFont(ofSize: 12)
        DispatchQueue.main.async {textView.window?.makeFirstResponder(textView)
            textView.setSelectedRange(NSMakeRange(0, 0)) }

        print("\(textView) is first responder") //proof that the first responder is shifting, but the cursor does not for some reason
        return textView
    }

The answer originally comes from here: How to make first responder in SwiftUI macOS

Thanks for all the help!

Send command shortcut to NSTextView's next responder

You can subclass NSTextView override keyDown method and call next responder:

import Cocoa

class TextView: NSTextView {
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
    }

    override func keyDown(with event: NSEvent) {
        super.keyDown(with: event)
        nextResponder?.keyDown(with: event)
    }
}

make NSTextField in NSTableCellView firstResponder()

Don't subclass NSTextField. You can make the text field in a view based table view first responder right out of the box.

It's pretty easy.

Assuming you know row and column (in your example row 0 and column 0) get the table cell view with view(atColumn: 0, row and make the text field first responder.

let keyView = tableView.view(atColumn: 0, row: 0, makeIfNecessary: false) as! NSTableCellView
view.window!.makeFirstResponder(keyView.textField)

And what is the second outlet for? Just use the standard default textField.

How to make first responder in SwiftUI macOS

If your MyField is a NSTextField the following works. Tested with Xcode 11.4 / macOS 10.15.4

  func makeNSView(context: Context) -> MyField {
    let view = MyField()

    // ... other properties set up here

    // wait for next cycle, so field be already in window
    DispatchQueue.main.async { 
        view.window?.makeFirstResponder(view)
    }
    return view
  }

NSTextField keep focus/first responder after NSPopover

Here's my attempt with help from How can one programatically begin a text editing session in a NSTextField? and How can I make my NSTextField NOT highlight its text when the application starts?:

The selected range is saved in textShouldEndEditing and restored in becomeFirstResponder. insertText(_:replacementRange:) starts an editing session.

var savedSelectedRanges: [NSValue]?

override func becomeFirstResponder() -> Bool {
    if super.becomeFirstResponder() {
        if self.aboutToShowPopover {
            if let ranges = self.savedSelectedRanges {
                if let fieldEditor = self.currentEditor() as? NSTextView {
                    fieldEditor.insertText("", replacementRange: NSRange(location: 0, length:0))
                    fieldEditor.selectedRanges = ranges
                }
            }
        }
        return true
    }
    return false
}

override func textShouldEndEditing(_ textObject: NSText) -> Bool {
    if super.textShouldEndEditing(textObject) {
        if self.aboutToShowPopover {
            let fieldEditor = textObject as! NSTextView
            self.savedSelectedRanges = fieldEditor.selectedRanges
            return true
        }
        let s = textObject.string
        if s == "2" {
            return true
        }
    }
    return false
}

Maybe rename aboutToShowPopover.

setting first responder on modal sheet

Code snippet pretty much does it all, except the border rect as in an NSTextField.

Force NSSearchField to Begin Editing When It Becomes First Responder

It turns out the key was bringing my application to the forefront.

I was able to give my application the system's focus by calling NSApplication.sharedApplication().activateIgnoringOtherApps(true). My NSSearchField, which was already becoming the first responder, can now directly be edited.

NSTextView won't become first responder

To force the first responder for a window, call this:

[[self window] makeFirstResponder:self.customTextContainerView];

(This assumes that everything else necessary for first-responder status is enabled, e.g. the view can't have overridden acceptsFirstResponder to return NO.)

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